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Vishay General Semiconductor - Diodes Division 1.5KE20HE3/54
- Part No.:
- 1.5KE20HE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE20HE3/54.pdf
- Description:
- TVS DIODE 16.2VWM 29.1VC 1.5KE
- Quantity:
- Payment:
- Shipping:
Inventory:9,867
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Product details
Overview
1.5KE20HE3/54 from Vishay General Semiconductor is a unidirectional Transient Voltage Suppressor (TVS) diode designed for primary overvoltage protection in DC power rails and signal lines. It features a 20 V breakdown voltage (VBR = 19.0–21.0 V at 1.0 mA), 17.1 V maximum standoff voltage (VWM), 27.7 V clamping voltage (VC) at 54.2 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - used to safeguard MOSFETs, ICs, and sensor interfaces against lightning-induced surges and inductive switching transients.
For engineers reviewing the 1.5KE20HE3/54 datasheet, 1.5KE20HE3/54 pinout, 1.5KE20HE3/54 application, or 1.5KE20HE3/54 equivalent, this device is evaluated for robust transient suppression in automotive power supplies, industrial I/O protection, and telecom interface circuits where fast response (<1 ns), low clamping ratio, and AEC-Q101 qualification (via HE3 suffix) are critical selection criteria.
Technical Context
The 1.5KE20HE3/54 operates as a silicon avalanche diode with glass-passivated junction, delivering bidirectional-capable clamping action only when configured in dual-diode arrangements - but itself is unidirectional, with cathode marked by color band. Its thermal resistance (RθJL = 15.4 °C/W) enables effective heat transfer to PCB copper or leads under repetitive surge conditions.
It complies with JEDEC DO-201AD package mechanical standards, supports soldering per J-STD-002/JESD 22-B102, and meets JESD 201 Class 2 whisker resistance (HE3 suffix). The device is rated for -55 °C to +175 °C operating junction temperature and exhibits 0.090 %/°C temperature coefficient of VBR.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 19.0 V / 21.0 V at 1.0 mA - defines precise avalanche initiation threshold for reliable overvoltage detection |
| VWM | 17.1 V - maximum continuous reverse working voltage before leakage exceeds 1.0 μA |
| VC @ IPPM | 27.7 V at 54.2 A - clamping voltage during 10/1000 µs surge, limiting downstream stress to safe levels |
| PPPM | 1500 W - peak pulse power handling capability ensures survivability against IEC 61000-4-5 Level 4 surges |
| IFSM | 200 A - non-repetitive forward surge current rating (8.3 ms half-sine) supports high-energy fault clearing |
| TJ max. | +175 °C - extended junction temperature rating enables use in under-hood automotive and high-ambient industrial environments |
| Package | DO-201AD - industry-standard axial-leaded package with 0.375" lead length, UL 94 V-0 molded epoxy body |
Pinout & Package
1.5KE20HE3/54 uses the DO-201AD (Case Style 1.5KE) axial-leaded package: matte tin-plated leads, glass-passivated junction, molded epoxy body meeting UL 94 V-0. Polarity is unidirectional; cathode is marked by a color band on the body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND or return path); conducts during positive surge events on cathode side |
| Cathode | Avalanche clamping terminal | Marked by color band; connected to protected line (e.g., 24 V rail); clamps reverse transients to VC = 27.7 V |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable, repeatable avalanche characteristics and long-term reliability under thermal cycling |
| 1500 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 surge immunity up to 4 kV (line-earth) without derating in standard layouts |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive powertrain and body electronics applications requiring zero defect field performance |
| Clamping time < 1 ns | Responds faster than MOVs or polymer-based protectors, preserving signal integrity in high-speed interfaces |
| JESD 201 Class 2 whisker resistance | Prevents tin whisker growth in high-humidity, high-temperature environments typical in industrial control cabinets |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump and alternator overshoot transients. IC Role / Device Role / Timing Role: Primary shunt clamping device placed directly across input terminals to clamp surges before they reach DC-DC converters or microcontrollers. Use Value: Limits transient voltage to ≤27.7 V, preventing latch-up or gate oxide rupture in downstream 3.3 V/5 V logic and power management ICs. | Use Scenario: Safeguarding 4–20 mA current loop transmitters and analog sensor outputs in factory automation systems. IC Role / Device Role / Timing Role: Unidirectional TVS mounted between signal line and ground to suppress ESD and inductive kickback from solenoid drivers. Use Value: Maintains signal fidelity with <1.0 μA leakage at 17.1 V, while clamping 1 kV/500 A transients within 1 ns to preserve measurement accuracy. |
| Telecom Line Interface Protection | Consumer Power Adapter Input Stage |
Use Scenario: Front-end surge protection for PoE-powered devices and DSL line cards exposed to lightning-induced surges. IC Role / Device Role / Timing Role: First-stage protector on tip/ring lines, coordinated with gas discharge tubes (GDTs) for staged energy diversion. Use Value: Provides low-clamp, fast-response stage that handles initial 10/1000 µs surge energy before GDT fires, reducing let-through voltage to PHY ICs. | Use Scenario: Secondary-side overvoltage clamp in AC-DC adapters for smart home hubs and IoT gateways. IC Role / Device Role / Timing Role: Unidirectional TVS placed across bulk capacitor output to absorb residual switching spikes and rectifier reverse recovery transients. Use Value: Prevents overvoltage damage to downstream USB-PD controllers and PMICs with 27.7 V clamping ceiling and 175 °C thermal endurance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20A | DO-214AA package (SMB), 20 V VBR, 30 V VC @ 42.9 A, 600 W PPPM | Lower power rating and surface-mount format - suited for space-constrained PCBs but not direct replacement for high-energy 1500 W requirements | Select SMBJ20A only when board area is limited and surge threat level is ≤IEC 61000-4-5 Level 3; requires layout redesign due to SMD footprint and lower IPPM |
| 1.5KE20A-E3/54 | Same DO-201AD package and electrical specs, but commercial-grade (non-AEC-Q101) and JESD 201 Class 1A whisker rating | Approved for industrial/commercial use only; excluded from automotive production programs requiring AEC-Q101 traceability | Choose 1.5KE20A-E3/54 for cost-sensitive non-automotive designs where AEC-Q101 is not mandated; identical pinout and mounting |
Compared with 1.5KE20HE3/54, SMBJ20A offers smaller footprint but sacrifices 60% peak power handling and automotive qualification; 1.5KE20A-E3/54 matches form/fit/function but lacks AEC-Q101 validation and enhanced whisker resistance - making 1.5KE20HE3/54 the sole choice for Tier-1 automotive supply chain compliance and high-energy surge resilience.
Availability
1.5KE20HE3/54 is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor conditioning, and telecom line interface protection requiring stable component supply, full traceability, and AEC-Q101 assurance.
Supply support for 1.5KE20HE3/54 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, and protection devices with emphasis on reliability, power handling, and automotive-grade qualification.
The 1.5KE series is engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and infrastructure applications where failure modes must be mitigated through proven avalanche ruggedness and thermal stability.
FAQ
What is the breakdown voltage tolerance for 1.5KE20HE3/54?
The 1.5KE20HE3/54 has a guaranteed breakdown voltage range of 19.0 V to 21.0 V at 1.0 mA test current, per Vishay's 88301 datasheet. This ±5% tolerance ensures consistent clamping behavior across production lots and supports reliable design margining for 24 V system protection. The value is measured under controlled 25 °C conditions and remains stable over temperature due to its 0.090 %/°C VBR coefficient.
Is 1.5KE20HE3/54 suitable for bidirectional transient protection?
No, 1.5KE20HE3/54 is a unidirectional TVS diode - it protects only against reverse-polarity transients on the cathode side. For bidirectional protection, Vishay offers the 1.5KE20CA variant. Using 1.5KE20HE3/54 in bidirectional configurations requires external circuitry (e.g., back-to-back pairing), which increases board area and complexity. Always verify polarity marking (cathode band) during placement of 1.5KE20HE3/54.
Does 1.5KE20HE3/54 meet AEC-Q101 requirements?
Yes, the HE3 suffix explicitly denotes AEC-Q101 qualification for 1.5KE20HE3/54, covering stress tests including HTGB, HTRB, TCT, and ESD per the standard. This qualification applies to the full 1.5KE6.8AHE3_B to 1.5KE220AHE3_B family and is documented in Vishay's 88301 revision 09-Aug-2022. The 1.5KE20HE3/54 is approved for automotive powertrain and chassis modules where zero-defect reliability is mandatory.
What is the maximum clamping voltage of 1.5KE20HE3/54 under surge conditions?
The maximum clamping voltage (VC) of 1.5KE20HE3/54 is 27.7 V at 54.2 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per JEDEC standards and represents the upper limit of voltage imposed on protected circuitry during worst-case surge events. It ensures compatibility with 3.3 V, 5 V, and 24 V logic families when properly decoupled.
Can 1.5KE20HE3/54 be soldered using standard reflow profiles?
No - 1.5KE20HE3/54 is an axial-leaded DO-201AD device intended for through-hole assembly or hand-soldering. Its packaging is not compatible with SMT reflow. Vishay specifies a maximum solder dip temperature of 275 °C for 10 seconds (per JESD 22-B106), and lead finish complies with J-STD-002 and JESD 22-B102. Reflow exposure would damage the molded epoxy body and compromise hermeticity of the glass-passivated junction in 1.5KE20HE3/54.
1.5KE20HE3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 16.2V
- Voltage - Breakdown (Min):
- 18V
- Voltage - Clamping (Max) @ Ipp:
- 29.1V
- Current - Peak Pulse (10/1000µs):
- 51.5A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 1.5KE
1.5KE20HE3/54 FAQ
1.How can I place an order for 1.5KE20HE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE20HE3/54 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 1.5KE20HE3/54 reliable?
The price and inventory of 1.5KE20HE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE20HE3/54 is usually 5 days.
3.What payment methods are accepted for 1.5KE20HE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE20HE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE20HE3/54?
1.5KE20HE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE20HE3/54 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 1.5KE20HE3/54?
For technical support, including 1.5KE20HE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE20HE3/54 requirements.
6.How does Aetrix verify that 1.5KE20HE3/54 is sourced from the original manufacturer or authorized distributors?
All 1.5KE20HE3/54 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 1.5KE20HE3/54 meets industry standards.
7.What is the process for return or replacement of 1.5KE20HE3/54?
All 1.5KE20HE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE20HE3/54, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 1.5KE20HE3/54 part is unused and in its original packaging.
Return procedure for 1.5KE20HE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE20HE3/54 Tags
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